<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
        <!-- 添加角色 -->
      <el-row>
          <el-col><el-button type="primary" @click="addDialogVisible = true">添加角色</el-button></el-col>
      </el-row>
        <!-- 角色列表 -->
      <el-table :data="roleList" stripe border>
        <el-table-column type="expand">
            <template scope="scope">
                <el-row v-for="(item1, i1) in scope.row.children" :key="item1.id" :class="['bdbottom', i1===0 ? 'bdtop' : '','vcenter']">
                    <!-- 一级权限 -->
                    <el-col :span="5">
                        <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                        <i class="el-icon-caret-right"></i>
                    </el-col>
                    <!-- 二级和三级权限 -->
                    <el-col :span="19">
                        <!-- 通过for循环渲染二级权限 -->
                        <el-row v-for="(item2,i2) in item1.children" :key="item2.id" :class="[i2===0 ?'':'bdtop','vcenter']">
                            <el-col :span="6">
                                <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <el-col :span="18">
                                <!-- 通过for循环渲染三级权限 -->
                                <el-tag v-for="(item3) in item2.children" :key="item3.id" type="warning" closable @close="removeRightById(scope.row,item3.id)">
                                    {{item3.authName}}
                                </el-tag>
                            </el-col>
                        </el-row>
                    </el-col>
                </el-row>
            </template>
        </el-table-column>
        <el-table-column type="index"></el-table-column>
        <el-table-column prop="roleName" label="角色名称"></el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
        <el-table-column label="操作" width="300">
            <template scope="scope">
                <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row)">编辑</el-button>
                <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRoleById(scope.row.id)">删除</el-button>
                <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
            </template>
        </el-table-column>
      </el-table>
    </el-card>


    <!-- ***********************对话框********************** -->
    <!-- 添加角色 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <el-form ref="addFormRef" :model="addForm" :rules="addFormRules" label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 编辑角色 -->
    <el-dialog
      title="编辑角色"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <el-form ref="editFormRef" :model="editForm" :rules="editFormRules" label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRole">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
    >
        <!-- 树形控件 -->
      <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" 
      default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights()">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: "Roles",
  data() {
    return {
      //角色列表
      roleList: [],
      //添加角色数据
      addForm: {
          roleName: '',
          roleDesc: ''
      },
      //添加角色数据的校验规则
      addFormRules: {
        roleName: [
          {required: true,message:'请输入角色名',trigger:'blur'},
        ]
      },
      //控制添加角色对话框的显示
      addDialogVisible: false,
      //控制修改角色对话框的显示
      editDialogVisible: false,
      //修改角色数据
      editForm:{
        
      },
      //修改角色数据的校验规则
      editFormRules: {
        roleName: [
                {required: true,message:'请输入角色名',trigger:'blur'},
                ]
      },
      //控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      //所有权限的数据
      rightsList: [],
      //树形控件的属性绑定对象
      treeProps:{
          children: 'children',
          label: 'authName'
      },
      //默认选中的
      defKeys:[],
      //当前即将分配权限的角色id
      roleId: ''


    };
  },
  created() {
    this.getRoleList();
  },
  methods: {
    //获取角色列表
    async getRoleList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200)
        return this.$message.error("获取角色列表失败");
      this.roleList = res.data;
    },
    //监听添加角色对话框的关闭
    addDialogClosed(){
        this.$refs.addFormRef.resetFields();
    },
    //添加角色
    async addRole(){
        //先校验
        this.$refs.addFormRef.validate(valid=>{
            if(!valid) return;
        })
        //发起请求
        const {data:res} = await this.$http.post("roles",this.addForm);
        console.log(res);
        if(res.meta.status !== 201) return this.$message.error('添加角色失败');
        //关闭对话框
        this.addDialogVisible = false;
        //更新列表
        this.getRoleList();
        //提示成功
        this.$message.success('添加角色成功');
    },
    //监听修改角色对话框的关闭
    editDialogClosed(){
        this.$refs.editFormRef.resetFields();
    },
    //展示编辑的对话框
    showEditDialog(data){
        this.editForm = {
            roleName: data.roleName,
            roleDesc: data.roleDesc,
            id: data.id
        }
        this.editDialogVisible = true;
    },
    //编辑角色
    async editRole(){
        //校验
        this.$refs.editFormRef.validate(valid=>{
            if(!valid) return;
        })

        //发送请求
        const {data:res} = await this.$http.put(`roles/${this.editForm.id}`
        ,{roleName: this.editForm.roleName, roleDesc: this.editForm.roleDesc})
        console.log(res);
        if(res.meta.status !== 200) return this.$message.error('编辑角色失败');
        //关闭对话框
        this.editDialogVisible = false;
        //更新列表
        this.getRoleList();
        //提示成功
        this.$message.success('编辑角色成功');
        
    },
    //删除角色
    async removeRoleById(id){
        //弹框询问用户是否删除数据
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        cancelButtonText: '取消',
        confirmButtonText: '确定',
        type: 'warning'
      }).catch(err=> err)

      //如果用户确认删除，则返回值为'confirm',取消则是'cancel'
      if(confirmResult !== 'confirm')
        return this.$message.info('已取消删除');
      //发起删除请求
      const {data:res} = await this.$http.delete(`roles/${id}`);
      if(res.meta.status !== 200) return this.$message.error('删除失败');
      this.$message.success('删除成功');
      this.getRoleList();
    },
    //根据id删除对应的权限
    async removeRightById(role,rightId){
        //弹框询问用户是否删除数据
      const confirmResult = await this.$confirm('此操作将删除用户的该权限, 是否继续?', '提示', {
        cancelButtonText: '取消',
        confirmButtonText: '确定',
        type: 'warning'
      }).catch(err=> err)

      //如果用户确认删除，则返回值为'confirm',取消则是'cancel'
      if(confirmResult !== 'confirm')
        return this.$message.info('已取消删除');
      //发起删除请求
      const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`);
      if(res.meta.status !== 200) return this.$message.error('删除失败');
      this.$message.success('删除成功');

      role.children = res.data;
    },
    //展示设置权限对话框
    async showSetRightDialog(role){
        this.roleId = role.id;
        //获取所有权限的数据
        const {data: res} = await this.$http.get('rights/tree');
        if(res.meta.status !== 200) return this.$message.error('获取权限数据失败');
        this.rightsList = res.data;
        //清空defKeys
        this.defKeys = [];
        //递归获取三级节点的id
        this.getLeafKeys(role,this.defKeys);
        //展示对话框
        this.setRightDialogVisible = true;
    },
    //通过递归的形式获取角色下所有三级权限的id,并保存到数组中
    getLeafKeys(node,arr){
        //如果当前node节点不包含children属性，则是三级节点
        if(!node.children)
            return arr.push(node.id);
        node.children.forEach(item=>{
            this.getLeafKeys(item,arr)
        })
    },
    //点击为角色分配权限
    async allotRights(){
        const keys = [
            ...this.$refs.treeRef.getCheckedKeys(),
            ...this.$refs.treeRef.getHalfCheckedKeys(),
        ]
        const idStr = keys.join(',')
        //发起请求
        console.log(this.roleId);
        const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids: idStr});
        console.log(res);
        if(res.meta.status !== 200) return this.$message.error('分配权限失败')
        this.$message.success('分配权限成功')
        this.getRoleList();
        this.setRightDialogVisible = false;
    }

  },
};
</script>


<style lang="less" scoped>
.el-tag{
    margin: 7px;
}

.bdtop{
    border-top: 1px solid #eee;
}

.bdbottom{
    border-bottom: 1px solid #eee;
}

.vcenter{
    display: flex;
    align-items: center;
}
</style>